Jamie, if you decide to use a clamp on, I hope that there is an indexing groove in the barrel and on the brake or else you will likely shoot off the brake. There is alot of force acting on a brake. Threaded is usually a better way of installing them.
The pics of the Holland set up is very nice.
The brake I use most often is the Micaluk AR15 brake. Looks just like a Holland, maybe a bit wider. Works very well and dirt cheap.
McC, if that brake came from Brownells, it is likely a Shrewd varmint brake. The ports only are on the side with none top and bottom. Correct? If so, the pic shows a canted brake.
Vais claim to fame was porting out the front to reduce noise to the shooter. Of course, this also reduced its affectiveness but it looks cool and shooters have enjoyed them.
Jerry